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理论物理通讯：英文版

All-Optical Switching between Optical Bistability and Multistability via Exciton Spin Relaxation

Asadpour, Seyyed, Hossein Hossein, Rahimpour, Soleimani, Hamid Hamid

Published Jan 1, 2015• 0 citations
OpenAlex

Abstract

光 bistability (OB ) 和在 4.8 nm ZnSe 单个量的井的光 multistability (OM ) 的所有光的协调控制基于激子和 biexciton 转变被调查。由使用一双锁阶段的激光脉搏，所有光的协调控制能被获得。有矩阵和麦克斯韦方程然后产出的密度的理论分析光 bistability 和光 multistability。由控制协调、支离破碎的过程， OB 和 OM 的紧张阀值能被修改，这被显示出。另外，在 OB 和 OM 之间或反过来也如此切换能为一些可控制的参数被发生，这被发现。

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Applied Optics•Jan 20, 2016•5 citations
光 bistability (OB ) 和在 4.8 nm ZnSe 单个量的井的光 multistability (OM ) 的所有光的协调控制基于激子和 biexciton 转变被调查。由使用一双锁阶段的激光脉搏，所有光的协调控制能被获得。有矩阵和麦克斯韦方程然后产出的密度的理论分析光 bistability 和光 multistability。由控制协调、支离破碎的过程， OB 和 OM 的紧张阀值能被修改，这被显示出。另外，在 OB 和 OM 之间或反过来也如此切换能为一些可控制的参数被发生，这被发现。
我们理论上调查光双性人稳定性(OB ) 并且多一种靠近环的配置的稳定性(OM ) 行为由一块退化联合地和退化探查地里面驾驶的原子系统一个单向性的戒指洞。OB 和 OM 行为能被分别地调整紧张和联合的地的频率 detuning 控制，这被发现。有趣地，我们的数字结果证明由在适当频率 detuning 下面调整联合的地的紧张从 OB 认识到转变到 OM 或反过来也如此是容易的。OB 行为上的原子合作参数的效果也被讨论。
All-optical coherent control of optical bistability (OB) and optical multistability (OM) in the 4.8 nm ZnSe single-quantum well based on excitons and biexciton transitions is investigated. By applying a pair of phase-locked laser pulses all-optical coherent control can be obtained. Theoretical analysis with density matrix and Maxwell equations then yield the optical bistability and optical multistability. It is shown that by controlling the coherent and incoherent processes, the intensity threshold of OB and OM can be modified. Also, it is found that the switching between OB and OM or vice versa can be occurred for some controllable parameters.
We proposed a new model for controlling the optical bistability (OB) and optical multistability (OM) in a defect slab doped with four-level GaAs/AlGaAs multiple quantum wells with 15 periods of 17.5 nm GaAs wells and 15-nm Al 0.3 Ga 0.7 As barriers. The effects of biexciton energy renormalization, exciton spin relaxation, and thickness of the slab on the OB and OM properties of the defect slab were theoretically investigated. We found that the transition from OB to OM or vice versa is possible by adjusting the controllable parameters in a lab. Moreover, the transmission, reflection, and absorption properties of the weak probe light through the slab were also discussed in detail.
In this paper, optical bistability (OB) and multistability (OM) properties of a defect dielectric slab are studied. A GsAs multiple quantum well nanostructure (MQW) with 17.5 nm GaAs wells and 15 nm Al(0.3) Ga(0.7) barriers is used in the dielectric medium as a defect layer. Therefore, properties of the refractive index of the slab can be changed in the presence of MQWs. It is observed that switching from OB to OM can be obtained by controlling some external parameters. We find that the exciton spin relaxation and thickness of the slab have essential roles in adjusting the OB and OM properties of the probe light through the slab. Moreover, transmission, reflection, and absorption properties of the propagating pulse through the slab are also discussed. We show that the subluminal and superluminal light transmission or reflection can be obtained via amplification of the probe pulse through the medium. We hope that our proposed model may be suitable for the development of nanoscale devices in all-optical quantum information technology.